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Method for online monitoring of work state of on-load tap-changer and early warning

A technology for on-load tap-off and switch operation, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc. It can solve the problems of inability to measure in real time, and the working status of OLTC cannot be obtained in real time, so as to optimize the use and maintenance plan and avoid property damage. loss, the effect of stable performance

Inactive Publication Date: 2016-07-13
CHINA AGRI UNIV
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  • Claims
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Problems solved by technology

The only disadvantage is that it cannot be measured in real time, and the working status of the OLTC cannot be obtained in real time. It is a passive measurement device

Method used

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  • Method for online monitoring of work state of on-load tap-changer and early warning
  • Method for online monitoring of work state of on-load tap-changer and early warning
  • Method for online monitoring of work state of on-load tap-changer and early warning

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Embodiment Construction

[0066] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0067] An on-line monitoring and early warning method for the working state of an on-load tap changer, characterized in that it includes the following steps:

[0068] Step 1, collect the voltage and current parameters of the transition contact branch components of the on-load tap-changer in real time;

[0069] Step 2. Calculate the following parameters according to the collected voltage and current parameters: transition resistance, transition time, transition waveform, three-phase synchronicity, contact resistance, and action program;

[0070] The specific calculation methods of each parameter involved in step 2 are existing known technologies and will not be described in detail;

[0071] Step 3: Judging t...

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Abstract

The invention relates to a method for online monitoring work state of an on-load tap-changer and early warning. The method comprises the following steps: 1. real-time acquiring voltages and current parameters of a branch element of a transition contact of the on-load tap-changer; 2. based on the acquired voltages and current parameters, computing the following parameters: a transition resistance, a transition time, a transition waveform, a three phase synchronization, a contact resistance, an action program; 3. determining the state of a device and communicating with the outside by using a communication module through the on-load tap-changer main body, implementing real-time monitoring whether the on-load tap-changer is working normally so as to send an alarm in time and turn off the device for maintenance, and establishing an early warning mechanism. According to the invention, the method implements online monitoring of OLTC work state, acquires OLTC real-time device parameters, and determines whether OLTC works normally so as to turn off the device for maintenance, prevents occurrence of accidents, and lowers property loss. At the same time, the method conducts analysis and computing on historical data, establishes the early warning mechanism prior to events, and exits an operation state in advance.

Description

technical field [0001] The invention relates to the technical field of power devices, in particular to an on-line monitoring and early warning method for the working state of an on-load tap changer. Background technique [0002] With the influx of new energy power generation technologies, grid voltage fluctuations are becoming more and more frequent, and it is necessary to effectively and timely adjust voltage changes to meet the needs of distribution network users. On-load tap changer (OLTC) has become the main power equipment for regulating voltage and balancing electric energy in and out. The on-load tap-changer is in a state of uninterrupted power supply during the working process, which can ensure that the power load can obtain the desired power quality without power failure. [0003] The use of a large number of OLTCs will not only improve the power quality, but also cause certain hidden dangers to the safe operation of the power system due to the aging and failure of...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/3271
Inventor 杜海江宋冬冬程林林志法
Owner CHINA AGRI UNIV
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